&#34;aminoindanes amides having a high fungicidal activity and their phytosanitary compositions&#34;

ABSTRACT

New aminoindanes amides are described, having general formula (I) 
     
       
         
         
             
             
         
       
     
     the relative phytosanitary compositions and their use for the control of phytopathogenic fungi.

The present invention relates to new amides of 4-aminoindanes having ahigh fungicidal activity, the relative phytosanitary compositions andtheir use for the control of phytopathogenic fungi.

More specifically, it relates to new amides of 4-aminoindanes, furthersubstituted by specific groups on the phenyl group of indane, having ahigh activity in the control of pathogenic fungi of importantagricultural crops.

Amides obtained from benzoic or hetero-cyclylcarboxylic acids condensedwith 4-aminoindanes are described in patent applications JP1070479, JP1117864, JP1313402, JP2157266, JP2249966, JP3077381, JP62096471,EP199822, EP256503, EP276177, EP280275, EP569912, U.S. Pat. No.5,093,347, WO2001/53259, WO2004/018438, WO2004/039789, WO2004/072023,WO2004/103975, WO2005/075452.

In particular, EP199822 describes1,3,5-trimethyl-N-(1,1-dimethyl-5-fluoro-4-indanyl)-4-pyrazolecarboxamide[compound (4)] and1,5-dimethyl-3-trifluoro-methyl-N-(1,1-dimethyl-7-fluoro-4-indanyl)-4-pyrazolecarboxamide(page 15, lines 19-20); U.S. Pat. No. 5,093,347 describes3-difluoromethyl-1-methyl-N-(1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide.

The amides of 4-aminoindanes described in the prior art, however, arenot completely satisfactory from the point of view of the level offungicidal activity against phytopathogenic fungi, the action range, andphytotoxicity with respect to the agricultural crops to be protected.

The Applicant has now surprisingly found that new amides, obtained bythe condensation of heterocyclic acids substituted by a CF₂H group, with4-aminoindanes containing alkyl groups in positions 1 and 3 of indaneand one or more further substituents on the phenyl ring, show, withrespect to the compounds described above, a much higher fungicidalactivity, a wider action range, a reduced or zero phytotoxicity withrespect to the most important agricultural crops.

The object of the present invention therefore relates to aminoindanesamides having the structural formula (I):

wherein:

-   -   R₁, R₂ and R₄, equal to or different from each other, represent        a C₁-C₂ alkyl group, a C₁-C₂ haloalkyl group, a C₃-C₆ cycloalkyl        group, a C₃-C₆ halocycloalkyl group, the groups R₁ and R₂ can        also possibly be joined to form a C₃-C₆ cycloalkyl group        spiro-condensed with indanyl;    -   R₃ represents a hydrogen atom, a C₁-C₃ alkyl group, a C₁-C₃        haloalkyl group, a C₃-C₆ cycloalkyl group, a C₃-C₆        halocycloalkyl group;    -   R₅ represents a halogen atom, a C₁-C₄ alkyl group, a C₁-C₄        haloalkyl group, a C₁-C₄ alkoxy group, a C₁-C₄ haloalkoxy group,        an SH group, a C₁-C₄ alkylthio group, a C₁-C₄ haloalkylthio        group;    -   n represents an integer ranging from 1 to 3;    -   A represents one of the following heterocycles A₁-A₅:

-   -   R₆ is a C₁-C₃ alkyl group, a C₁-C₃ haloalkyl group, a C₃-C₆        cycloalkyl group, a C₃-C₆ halocycloalkyl group, a C₁-C₄ alkoxy        group, a C₁-C₄ haloalkoxy group, an SH group, a C₁-C₄ alkylthio        group, a C₁-C₄ haloalkylthio group.

Examples of compounds having formula (I) which are particularlyinteresting for their activity are:

-   (1)    3-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide;-   (2)    4-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-2-methyl-5-thiazolecarboxamide;-   (3)    3-difluoromethyl-1-methyl-N-(1,1,3,7-tetramethyl-4-indanyl)-pyrazolecarboxamide;-   (4)    4-difluoromethyl-2-methyl-N-(1,1,3,7-tetramethyl-4-indanyl)-5-thiazolecarboxamide;-   (5)    3-difluoromethyl-1-methyl-N-(7-methoxy-1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide;-   (6)    4-difluoromethyl-2-methyl-N-(7-methoxy-1,1,3-trimethyl-4-indanyl)-5-thiazolecarboxamide;-   (7)    3-difluoromethyl-1-methyl-N-(7-methylthio-1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide;-   (8)    4-difluoromethyl-2-methyl-N-(7-methylthio-1,1,3-trimethyl-4-indanyl)-5-thiazolecarboxamide;-   (9)    3-difluoromethyl-1-methyl-N-(7-trifluoromethoxy-1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide;-   (10)    4-difluoromethyl-2-methyl-N-(7-trifluoromethoxy-1,1,3-trimethyl-4-indanyl)-5-thiazolecarboxamide;-   (11)    3-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-4-furazancarboxamide-   (12)    4-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-2-methylthio-4-pyrimidinecarboxamide.-   (13)    3-difluoromethyl-N-(7-chloro-1,1,3-trimethyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide;-   (14)    3-difluoromethyl-N-(7-chloro-1,1-diethyl-3-methyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide;-   (15)    4-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-5-thiadiazolecarboxamide.

Preferred compounds having general formula (I) are those wherein Arepresents A₁, R₁, R₂, R₄ and R₆ are a methyl group, R₃ is a hydrogenatom, R₅ represents a halogen.

Examples of halogen are: fluorine, chlorine, bromine, iodine.

Examples of C₁-C₄ alkyl, linear or branched, are methyl, ethyl,n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl.

Examples of C₁-C₄ haloalkyl are fluoromethyl, difluoromethyl,trifluoromethyl, chloromethyl, dichloromethyl, 2,2,2-trifluoroethyl,1,1,2,2-tetrafluoroethyl, pentafluoroethyl, heptafluoropropyl,4,4,4-trichlorobutyl.

Examples of C₁-C₄ alkoxy, linear or branched, are methoxy, ethoxy,n-propoxy, isopropoxy, n-butoxy, isobutoxy, sec-butoxy, tert-butoxy.

Examples of C₁-C₄ haloalkoxy are fluoromethoxy, di fluoromethoxy,trifluoromethoxy, chloromethoxy, dichloromethoxy, 2,2,2-trifluoroethoxy,1,1,2,2-tetra-fluoroethoxy, 1,1,2,3,3,3-hexafluoropropoxy,4,4,4-trichlorobutoxy.

Examples of C₃-C₆ cycloalkyl are cyclopropyl, cyclobutyl, cyclopentyl,cyclohexyl.

Examples of C₃-C₆ halocycloalkyl are 2,2-dichloro-cyclopropyl,2,2-difluorocyclopropyl, 2,2,3,3-tetrafluorocyclobutyl,3,3-difluorocyclopentyl, 2-fluorocyclohexyl.

Examples of C₁-C₄ alkylthio, linear or branched, are methylthio,ethylthio, n-propylthio, isopropylthio, n-butylthio, isobutylthio,sec-butylthio, tert-butylthio.

Examples of C₁-C₄ haloalkylthio are fluoromethylthio,difluoromethylthio, trifluoromethyl-thio, chloromethylthio,dichloromethylthio, 2,2,2-trifluoroethylthio,1,1,2,2-tetra-fluoroethylthio, 1,1,2,3,3,3-hexafluoropropyl-thio,4,4,4-trichloro-butylthio.

Due to the asymmetry of the carbon atom in position 3 of the indanylring and possibly the atoms in position 1 (when R₁ is different from R₂)and 2 (when R₃ is different from hydrogen), the compounds having formula(I) may occur as mixtures of optical isomers and possiblydiastereoisomers.

The compounds having formula (I) are therefore included in the spirit ofthe present invention both as racemic and possibly diastereoisomericmixtures, both as partially separated mixtures, either as single opticalisomers and possibly as single diastereoisomers.

The compounds having formula (I) are prepared by reacting a substitutedacid or one of its derivatives having formula (II), with an anilinehaving formula (III), according to the reaction scheme indicated below:

In these formulae:A, R₁, R₂, R₃, R₄, R₅ and n have the meanings defined above;X represents a hydroxy OH; a halogen atom; a C₁-C₄ alkoxy group; aphenoxy group; an acyloxy group RCOO wherein R in turn represents agroup A, a C₁-C₄ alkyl group or a phenyl optionally substituted by C₁-C₄alkyl groups, C₁-C₄ haloalky groups, halogen atoms.

The reaction conditions for effecting the process indicated above, inwhich an acid or one of its corresponding halides, esters or anhydrides(possibly mixed) is reacted with an amine, are widely described inchemical literature, for example in “Advanced Organic Chemistry”, JerryMarch, 4^(th) Edition, 1992, John Wiley & Sons Pub., pages 417-424 andreferences cited therein.

Various alternative conditions can be selected, also depending on thenature of the compound having formula (II); for example, when Xrepresents a halogen atom, preferably chlorine, the reaction is normallycarried out in the presence of an inert solvent and in the presence ofan organic or inorganic base, at a temperature ranging from −20° C. tothe boiling point of the reaction mixture.

Examples of solvents which can be used for the above reaction includewater, aliphatic or cycloaliphatic hydrocarbons (petroleum ether,hexane, cyclohexane etc.), chlorinated hydrocarbons (methylene chloride,chloroform, carbon tetrachloride, dichloroethane, etc.), aromatichydrocarbons (benzene, toluene, xylene, chlorobenzene, etc.), ethers(diethyl ether, diisopropyl ether, dimethoxyethane, dioxane,tetrahydrofuran, etc.), esters (ethyl acetate etc.), ketones (acetone,methylethylketone, methylpropyl-ketone, methylisobutylketone, etc.),nitriles (acetonitrile, benzonitrile, etc.), aprotic dipolar solvents(dimethylformamide, dimethylacetamide, hexamethylphosphorotriamide,dimethylsulfoxide, sulfolane, N-methylpyrrolidone, etc.)

Inorganic bases which can be used for the purpose are, for example,hydroxides, carbonates and bicarbonates of sodium or potassium.

Organic bases which can be used for the purpose are, for example,triethylamine, pyridine, 4-N,N-dimethyl-aminopyridine,N,N-dimethylaniline, N-methyl-piperidine, lutidine, diazabicyclo-octane(DABCO), diazabicyclononene (DBN), diazabicycloundecene (DBU).

The intermediates having general formulae (II) and (III), when they arenot already described in literature, can in any case be prepared byadapting synthetic methods well known to experts in the field.

For example, pyrazolecarboxylic acids [formula (II) wherein A=A₁, X=OH]can be prepared according to what is described in U.S. Pat. No.5,093,347; thiazolecarboxylic acids [formula (II) wherein A=A₂, X=OH]can be prepared according to what is described in DE 10250110;pyrimidinecarboxylic acids [formula (II) wherein A=A₄, X=OH] can beprepared according to what is described in EP 569912.

The corresponding acid derivatives (esters, anhydrides, halides) can beeasily prepared from these according to what is described, for example,in “Advanced Organic Chemistry”, Jerry March, 4^(th) Edition, 1992, JohnWiley & Sons Pub., pages 392-402, 437-438 and references cited therein.

As already mentioned, the compounds having general formula (I) have avery high fungicidal activity which is exerted with respect to numerousphytopathogenic fungi which attack important agricultural crops.

A further object of the present invention therefore relates to the useof the compounds having general formula (I) for the control ofphytopathogenic fungi of agricultural crops.

Examples of phytopathogenic fungi which can be effectively fought withthe compounds of general formula (I) according to the present invention,are those belonging to the groups of Basidiomycetes, Ascomycetes,Deuteromycetes or fungi imperfecti, Oomycetes: Puccinia spp., Ustilagospp., Tilletia spp., Uromyces spp., Phakopsora spp., Rhizoctonia spp.,Erysiphe spp., Sphaerotheca spp., Podosphaera spp., Uncinula spp.,Helminthosporium spp., Rhynchosporium spp., Pyrenophora spp., Moniliniaspp., Sclerotinia spp., Septoria spp. (Mycosphaerella spp.), Venturiaspp., Botrytis spp., Alternaria spp., Fusarium spp., Cercospora spp.,Cercosporella herpotrichoides, Colletotrichum spp., Pyricularia oryzae,Sclerotium spp., Phytophtora spp., Pythium spp., Plasmopara viticola,Peronospora spp., Pseudoperonospora cubensis, Bremia lactucae.

The main crops which can be protected with the compounds of the presentinvention comprise cereals (wheat, barley, rye, oats, rice, corn,sorghum, etc.), fruit trees (apple, pear, plumb, peach, almond, cherry,banana, vines, strawberry, raspberry, blackberry, etc.), citrus trees(orange, lemon, mandarin, grapefruit, etc.), legumes (beans, peas,lentils, soybean, etc.), vegetables (spinach, lettuce, asparagus,cabbage, carrots, onions, tomatoes, potatoes, aubergines, peppers,etc.), cucurbitaceae (pumpkins, zucchini, cucumbers, melons,water-melons, etc.), oilseeds (sunflower, rape, peanut, castor-oilplant, coconut, etc.) tobacco, coffee, tea, cocoa, sugar beet, sugarcane, cotton.

In particular, the compounds having general formula (I) have proved tobe considerably effective in the control of Plasmopara viticola onvines, Phytophtora infestans and Botrytis Cinerea on tomatoes, Pucciniarecondita, Erysiphe graminis, Helminthosporium teres, Septoria nodorumand Fusarium spp. on cereals; in the control of Phakopsora pachyrhizi onsoya; in the control of Uromyces appendiculatus on beans; in the controlof Venturia inaequalis on apples, in the control of Sphaerotecafuliginea on cucumbers.

Furthermore, the compounds having general formula (I) are also effectivein the control of phytopathogenic bacteria and viruses, such as forexample Xanthomonas spp., Pseudomonas spp., Erwinia amylovora, themosaic virus of tobacco.

The compounds having formula (I) are capable of exerting a fungicidalaction of both in curative and preventive applications and have a verylow or zero phytotoxicity on the crops treated.

For practical uses in agriculture, it is often preferable to usefungicidal compositions containing compounds having formula (I)according to the present invention, suitably formulated.

A further object of the present invention relates to fungicidalcompositions comprising one or more compounds having formula (I), asolvent and/or solid or liquid diluent, possibly a surfactant.

The above fungicidal compositions can be in the form of dry powders,wettable powders, emulsifiable concentrates, emulsions, micro-emulsions,pastes, granulates, water dispersible granules, solutions, suspensions,etc.: the choice of the type of composition will depend on the specificuse.

The fungicidal compositions are prepared in the known way, for exampleby diluting or dissolving the active substance with a solvent mediumand/or a solid or liquid diluent, possibly in the presence ofsurfactants.

Solid diluents or supports which can be used for example are: silica,kaolin, bentonite, talc, diatomaceous earth, dolomite, calciumcarbonate, magnesia, gypsum, clays, synthetic silicates, attapulgite,sepiolite.

Solvents or liquid diluents which can be used, are for example, inaddition to water, aromatic organic solvents (xylols or blends ofalkylbenzols, chlorobenzene, etc.), paraffins (petroleum fractions),alcohols (methanol, propanol, butanol, octanol, glycerine, etc.), esters(ethyl acetate, isobutyl acetate, alkyl carbonates, alkyl esters ofadipic acid, alkyl esters of glutaric acid, alkyl esters of succinicacid, alkyl esters of lactic acid, etc.), vegetable oils (rape oil,sunflower oil, soybean oil, castor oil, corn oil, peanut oil, and theiralkyl esters), ketones (cyclohexanone, acetone, acetophenone,isophorone, ethylamylketone, etc.), amides (N,N-dimethylformamide,N-methylpyrrolidone, etc.), sulfoxides and sulfones (dimethylsulfoxide,dimethylsulfone, etc.), and mixtures thereof.

Sodium salts, calcium salts, potassium salts, salts of triethylamine ortriethanolamine of alkyl-naphthalenesulfonates,polynaphthalenesulfonates, alkyl sulfonates, aryl sulfonates, alkylarylsulfonates, polycarboxylates, sulfosuccinates, alkyl sulfosuccinates,lignin sulfonates, alkyl sulfates, can be used as surfactants; as alsopolyethoxylated fatty alcohols, polyethoxylated alkylphenols,polyethoxylated esters of sorbitol, polypropoxy polyethoxylates (blockpolymers).

The fungicidal compositions can also contain special additives forparticular purposes, such as for example, antifreeze agents such aspropylene glycol, or adhesion agents, such as gum Arabic, polyvinylalcohol, polyvinyl pyrrolidone, etc.

If desired, other compatible active principles can be added to thefungicidal compositions containing the compounds of general formula (I),such as, for example, fungicides different from those having generalformula (I), phytoregulators, antibiotics, herbicides, insecticides,fertilizers and/or mixtures thereof.

Examples of fungicides different from those having general formula (I),which can be included in the fungicidal compositions object of thepresent invention are: acibenzolar, ametoctradin, amisulbrom,ampropylfos, anilazine, azaconazole, azoxystrobin, benalaxyl,benalaxyl-M, benomyl, benthiavalicarb, bitertanol, bixafen,blasticidin-S, boscalid, bromuconazole, bupirimate, buthiobate,captafol, captan, carbendazim, carboxin, carpropamid, chinomethionat,chloroneb, chlorothalonil, chlozolinate, cyazofamid, cyflufenamid,cymoxanil, cyproconazole, cyprodinil, debacarb, dichlofluanid, dichlone,diclobutrazol, diclomezine, dicloran, diclocymet, diethofencarb,difenoconazole, diflumetorim, dimethirimol, dimethomorph, dimoxystrobin,diniconazole, dinocap, dipyrithione, ditalimfos, dithianon, dodemorph,dodine, edifenphos, epoxiconazole, etaconazole, ethaboxam, ethirimol,ethoxyquin, etridiazole, famoxadone, fenamidone, fenaminosulf,fenapanil, fenarimol, fenbuconazole, fenfuram, fenhexamid, fenoxanil,fenpiclonil, fenpropidin, fenpropimorph, fentin, ferbam, ferimzone,fluazinam, fludioxonil, flumetover, flumorph, fluopicolide, fluopyram,fluoroimide, fluotrimazole, fluoxastrobin, fluquinconazole, flusilazole,flusulfamide, flutianil, flutolanil, flutriafol, folpet,fosetyl-aluminium, fuberidazole, furalaxyl, furametpyr, furconazole,furconazole-cis, guazatine, hexaconazole, hymexazol, idrossichinolinasolfato, imazalil, imibenconazole, iminoctadine, ipconazole, iprobenfos,iprodione, isoprothiolane, iprovalicarb, isopyrazam, isotianil,kasugamycin, kresoxim-methyl, mancopper, mancozeb, mandipropamid, maneb,mebenil, mepanipyrim, mepronil, meptyldinocap, metalaxyl, metalaxyl-M,metconazole, methfuroxam, metiram, metominostrobin, metrafenone,metsulfovax, myclobutanil, natamycin, nicobifen, nitrothal-isopropyl,nuarimol, ofurace, orysastrobin, oxadixyl, oxpoconazole, oxycarboxin,pefurazoate, penconazole, pencycuron, penflufen, pentachlorofenol andits salts, penthiopyrad, phthalide, picoxystrobin, piperalin, Bordeauxmixture, polyoxins, probenazole, prochloraz, procymidone, propamocarb,propiconazole, propineb, proquinazid, prothiocarb, prothioconazole,pyracarbolid, pyraclostrobin, pyrametostrobin, pyraoxystrobin,pyrazophos, pyribencarb, pyrifenox, pyrimethanil, pyroquilon, pyroxyfur,quinacetol, quinazamid, quinconazole, quinoxyfen, quintozene,rabenzazole, copper hydroxide, copper oxychloride, copper (I) oxide,copper sulfate, sedaxane, silthiofam, simeconazole, spiroxamine,streptomycin, tebuconazole, tetraconazole, thiabendazole, thiadifluor,thicyofen, thifluzamide, thiophanate, thiophanate-methyl, thiram,tiadinil, tioxymid, tolclofos-methyl, tolylfluanid, triadimefon,triadimenol, triarimol, triazbutil, triazoxide, tricyclazole, tridemorf,trifloxystrobin, triflumizole, triforine, triticonazole, uniconazole,uniconazole-P, validamycin, valifenalate, vinclozolin, zineb, ziram,sulfur, zoxamide.

The concentration of compounds having general formula (I) in the abovecompositions can vary within a wide range; it generally ranges from 1%to 90%, preferably from 5% to 50%.

The application of these compositions can be effected on each part ofthe plant, for example on the leaves, stems, branches and roots, or onthe seeds themselves before sowing, or on the ground in which the plantgrows.

A further object of the present invention therefore relates to a methodfor the control of phytopathogenic fungi in agricultural crops, whichconsists in the application of effective dosages of the compounds havingformula (I), used as such or formulated in fungicidal compositions asdescribed above.

The quantity of compound to be applied for obtaining the desired effectcan vary in relation to different factors, such as, for example, thecompound used, the crop to be preserved, the type of pathogen, thedegree of infection, the climatic conditions, the application method,the formulation adopted.

Doses of compound ranging from 10 g to 5 kg per hectare of agriculturalcrop generally provide a sufficient control.

The following examples are provided for a better understanding of theinvention for illustrative and non-limiting purposes of the same.

EXAMPLE 1 Preparation of3-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide(Compound N. 1)

0.4 ml of triethylamine were dropped into a solution of7-fluoro-1,1,3-trimethyl-4-aminoindane (0.45 g) and3-(difluoromethyl)-1-methyl-1H-pyrazole-4-carbonyl chloride (0.44 g) in8 ml of dichloromethane.

After being kept under stirring for 8 hours at room temperature, dilutedhydrochloric acid was added to the reaction mixture, the phases wereseparated and the aqueous phase was extracted with dichloromethane.

The organic phases were then joined, anhydrified with sodium sulfate andconcentrated at reduced pressure.

The raw product obtained was subsequently purified on a silica gelcolumn (eluent hexane/ethyl acetate 8/2) to give 0.45 g of the desiredproduct, a white solid with a melting point of 147° C.

¹H NMR (200 Mhz, CDCl₃) δ a: 1.43 (3H, d), 1.38 (3H, s), 1.44 (3H, s),1.66 (1H, dd), 2.21 (1H, dd), 3.38 (1H m), 3.98 (3H, s), 6.81 (1H, bs),6.95 (1H, t), 6.70 (1H, m), 7.81 (1H, bs), 8.03 (1H, bs).

EXAMPLE 2 Preparation of Compounds N.2-9

Analogously to the procedure of Example 1, the compounds of generalformula (I) reported in Table 1 have been prepared.

TABLE 1 Compound N^(o) A R₁ R₂ R₃ R₄ R₅ 2 3-difluoromethyl-1-methyl-4-Et Et H Me 7-F pyrazolyl 3 3-difluoromethyl-1-methyl-4- Me Me H Me 7-OMepyrazolyl 4 4-difluoromethyl-2-methyl-5- Me Me H Me 7-F thiazolyl 53-difluoromethyl-1-methyl-4- Me Me H Me 7-Me pyrazolyl 63-difluoromethyl-1-methyl-4- Me Me H Me 7-Cl pyrazolyl 73-difluoromethyl-1-methyl-4- Me Me H Me 7-OCF₃ pyrazolyl 83-difluoromethyl-1-methyl-4- Me Me H Me 7-SMe pyrazolyl Melting points:N^(o) 2: 115° C.; N^(o) 3: 110° C.; N^(o) 4: 95° C.; N^(o) 6: 140° C.;N^(o) 7: 105° C.; N^(o) 8: 97° C.

EXAMPLE 3 Determination of the Fungicidal Activity in PreventiveApplication (5 Days) Against Erysiphe graminis on Wheat

Leaves of wheat plants of the Salgemma variety, grown in pots in aconditioned environment kept at 20° C. and 70% of relative humidity(R.H.), were treated by spraying on both sides of the leaves with thecompounds under examination, dispersed in hydroacetonic solutions at 20%by volume of acetone.

After remaining 5 days in a conditioned environment, the plants wereinfected under dry conditions by shaking over them, in order todistribute the inoculum, plants previously infected by Erysiphegraminis.

The plants were then maintained in the same cell, in ahumidity-saturated environment and at a temperature ranging from 18 to24° C. for 12 days.

At the end of this period, the external symptoms of the pathogenappeared and it was therefore possible to proceed with the evaluation ofthe intensity of the infection, on both the parts treated directly withthe products (T), and also on the parts which had developed during thetest (NT), by means of a visible percentage evaluation scale of the areaof affected leafs; the scale comprises, as extremes, the value 100(healthy plant) and the value 0 (completely infected plant).

At the same time, the phytotoxicity was evaluated (percentage of leafnecrosis) induced on the wheat plants by the application of theproducts: in this case, the evaluation scale varies from 0 (completelyhealthy plant) to 100 (completely necrotized plant).

Table 2 shows the results obtained by carrying out the test describedwith compound N. 1, compared with the following reference productsdescribed in prior art:

-   RC1:    3-difluoromethyl-1-methyl-N-(1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide    of U.S. Pat. No. 5,093,347;-   RC2:    1,5-dimethyl-3-trifluoro-methyl-N-(1,1-dimethyl-7-fluoro-4-indanyl)-4-pyrazolecarboxamide    [EP199822, page 15, lines 19-20];-   RC3:    1,3,5-trimethyl-N-(1,1-dimethyl-5-fluoro-4-indanyl)-4-pyrazolecarboxamide    [EP199822, compound (4)].

TABLE 2 Preventive fungicidal activity (5 days) against Erysiphegraminis on wheat. Dose Activity Compound (ppm) T/NT Phytotoxicity N. 1125 95/90 0 CR-1 125 70/65 10 CR-2 125 25/15 0 CR-3 125 10/0  0

1. Aminoindane amides having structural formula (I):

wherein: R₁, R₂ and R₄, equal to or different from each other, representa C₁-C₃ alkyl group, a C₁-C₃ haloalkyl group, a C₃-C₆ cycloalkyl group,a C₃-C₆ halocycloalkyl group, the groups R₁ and R₂ can possibly also bejoined to form a C₃-C₆ cycloalkyl group spiro-condensed with indanyl; R₃represents a hydrogen atom, a C₁-C₃ alkyl group, a C₁-C₃ haloalkylgroup, a C₃-C₆ cycloalkyl group, a C₃-C₆ halocycloalkyl group; R₅represents a halogen atom, a C₁-C₄ alkyl group, a C₁-C₄ haloalkyl group,a C₁-C₄ alkoxy group, a C₁-C₄ haloalkoxy group, an SH group, a C₁-C₄alkylthio group, a C₁-C₄ haloalkylthio group; n represents an integerranging from 1 to 3; A represents one of the following heterocyclesA₁-A₅:

R₆ is a C₁-C₃ alkyl group, a C₁-C₃ haloalkyl group, a C₃-C₆ cycloalkylgroup, a C₃-C₆ halocycloalkyl group, a C₁-C₄ alkoxy group, a C₁-C₄haloalkoxy group, an SH group, a C₁-C₄ alkylthio group, a C₁-C₄haloalkylthio group.
 2. The compounds according to claim 1,characterized in that in formula (I), A represents A₁, R₁, R₂, R₄ and R₆are a methyl group, R₃ is a hydrogen atom, R₅ represents a halogen. 3.The compounds according to claim 1, selected from the followingcompounds having general formula (I):3-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide;4-difluoromethyl-N-(7-fluoro-1,1,3-trimethyl-4-indanyl)-2-methyl-5-thiazolecarboxamide;3-difluoromethyl-1-methyl-N-(1,1,3,7-tetramethyl-4-indanyl)-pyrazolecarboxamide;3-difluoromethyl-1-methyl-N-(7-methoxy-1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide;3-difluoromethyl-1-methyl-N-(7-methylthio-1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide;3-difluoromethyl-1-methyl-N-(7-trifluoromethoxy-1,1,3-trimethyl-4-indanyl)-4-pyrazolecarboxamide;3-difluoromethyl-N-(7-chloro-1,1,3-trimethyl-4-indanyl)-1-methyl-4-pyrazolecarboxamide;4. The compounds according to claim 1, characterized in that they are inthe form of racemic mixtures, diastereoisomeric mixtures, partiallyseparated mixtures, single optical isomers and/or singlediastereoisomers.
 5. Fungicidal compositions comprising one or morecompounds having formula (I) according to claim 1, a solvent and/orsolid or liquid diluent, possibly a surfactant.
 6. Fungicidalcompositions according to claim 5, also comprising active principlescompatible with the compounds having general formula (I), selected fromfungicides different from the compounds having general formula (I),phytoregulators, antibiotics, herbicides, insecticides, fertilizersand/or mixtures thereof, antifreeze agents, adhesion agents.
 7. Thecompositions according to claim 5, wherein the concentration ofcompounds having general formula (I) ranges from 1 to 90% by weight withrespect to the total weight of the composition, preferably from 5 to 50%by weight with respect to the total weight of the composition.
 8. Use ofaminoindane amides having structural formula (I):

wherein: R₁, R₂ and R₄, equal to or different from each other, representa C₁-C₃ alkyl group, a C₁-C₃ haloalkyl group, a C₃-C₆ cycloalkyl group,a C₃-C₆ halocycloalkyl group, the groups R₁ and R₂ can possibly also bejoined to form a C₃-C₆ cycloalkyl group spiro-condensed with indanyl; R₃represents a hydrogen atom, a C₁-C₃ alkyl group, a C₁-C₃ haloalkylgroup, a C₃-C₆ cycloalkyl group, a C₃-C₆ halocycloalkyl group; R₅represents a halogen atom, a C₁-C₄ alkyl group, a C₁-C₄ haloalkyl group,a C₁-C₄ alkoxy group, a C₁-C₄ haloalkoxy group, an SH group, a C₁-C₄alkylthio group, a C₁-C₄ haloalkylthio group; n represents an integerranging from 1 to 3; A represents one of the following heterocyclesA₁-A₅:

R₆ is a C₁-C₃ alkyl group, a C₁-C₃ haloalkyl group, a C₃-C₆ cycloalkylgroup, a C₃-C₆ halocycloalkyl group, a C₁-C₄ alkoxy group, a C₁-C₄haloalkoxy group, an SH group, a C₁-C₄ alkylthio group, a C₁-C₄haloalkylthio group, for the control of phytopathogenic fungi ofagricultural crops.
 9. Use of the compounds according to claim 2 for thecontrol of phytopathogenic fungi of agricultural crops.
 10. Use ofcompositions according to claim 5 for the control of phytopathogenicfungi of agricultural crops.
 11. Use of compositions according to claim8 for the control of phytopathogen fungi belonging to the group ofBasidiomycetes, Ascomycetes, Deuteromycetes or fungi imperfecti,Oomycetes: Puccinia spp., Ustilago spp., Tilletia spp., Uromyces spp.,Phakopsora spp., Rhizoctonia spp., Erysiphe spp., Sphaerotheca spp.,Podosphaera spp., Uncinula spp., Helminthosporium spp., Rhynchosporiumspp., Pyrenophora spp., Monilinia spp., Sclerotinia spp., Septoria spp.(Mycosphaerella spp.), Venturia spp., Botrytis spp., Alternaria spp.,Fusarium spp., Cercospora spp., Cercosporella herpotrichoides,Colletotrichum spp., Pyricularia oryzae, Sclerotium spp., Phytophtoraspp., Pythium spp., Plasmopara viticola, Peronospora spp.,Pseudoperonospora cubensis, Bremia lactucae.
 12. Use according to claim8, wherein the agricultural crops are cereals, fruit trees, citrusfruits, legumes, horticultural crops, cucurbits, oleaginous plants,tobacco, coffee, tea, cocoa, sugar beet, sugar cane, cotton.
 13. Useaccording to claim 8 for the control of Plasmopara viticola on vines,Phytophtora infestans and Botrytis Cinerea on tomatoes, Pucciniarecondita, Erisiphae graminis, Helminthosporium teres, Septoria nodorumand Fusarium spp. on cereals; Phakopsora pachyrhizi on soya; Uromycesappendiculatus on beans; Venturia inaequalis on apples, Sphaerotecafuliginea on cucumbers.
 14. Use of the compounds according to claim 1for the control of phytopathogenic bacteria or viruses.
 15. A method forcontrolling phytopathogenic fungi in agricultural crops, which consistsin applying effective doses of compounds according to claim 1 in amountsranging from 10 g to 5 kg of compound having formula (I) per hectare ofagricultural crop.
 16. Use of the compositions according to claim 5 forthe control of phytopathogenic bacteria or viruses.
 17. A method forcontrolling phytopathogenic fungi in agricultural crops, which consistsin applying effective doses of fungicidal compositions according toclaim 5, in amounts ranging from 10 g to 5 kg of compound having formula(I) per hectare of agricultural crop.